Proteolitic activity of lactic bacteria isolated from the phyllosphere of plants

Mirzaeva Shabnam Adalat, Ganbarov Khudaverdi

This work is devoted to the study of the protease activity of lactic acid bacteria isolated from the phyllosphere of fruit plants in Azerbaijan. It was shown that a relatively high protease activity in bacteria of the genus Lactobacillus was observed in L.helveticus and L.plantarum, in the genus Leuconostoc - L.citreum, in the genus Pedicoccus - P.cerevisiae, in the genus Peptococcus - P.niger, and in the genus Streptococcus - S.lactis. It should be noted that strains and species of the same genus did not differ significantly in protease activity. However, the studied lactic acid bacteria differed significantly in protease activity at the genus level. Significant protease activity was shown by all representatives of the genera Lactobacillus and Streptoccoccus. Bacteria of the genera Leuconostoc and Peptococcus showed the least protease activity. Bacteria of the genus Pedicoccus occupied a middle position in terms of protease activity. Thus, the protease activity in representatives of the genera Lactobacillus and Streptococcus was 22.2-27.1 times greater than in bacteria of the genus Leuconostoc, 7.4-9.6 times greater than in bacteria of the genus Peptococcus and 2.1-2. 6 times more than bacteria of the genus Pedicoccus.

Keywords:protease activity, lactic acid bacteria, Lactobacillus, Streptococcus, Pedicoccus, Peptococcus, Leuconostoc.